Build aicasm as host program, not via world's compiler.
[dragonfly.git] / lib / libc / locale / fix_grouping.c
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1/*
2 * Copyright (c) 2001 Alexey Zelkin <phantom@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: src/lib/libc/locale/fix_grouping.c,v 1.6.2.1 2002/03/12 17:17:48 phantom Exp $
1de703da 27 * $DragonFly: src/lib/libc/locale/Attic/fix_grouping.c,v 1.2 2003/06/17 04:26:44 dillon Exp $
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28 */
29
30#include <ctype.h>
31#include <limits.h>
32#include <stddef.h>
33
34static const char nogrouping[] = { CHAR_MAX, '\0' };
35
36/*
37 * "3;3;-1" -> "\003\003\177"
38 */
39
40const char *
41__fix_locale_grouping_str(const char *str) {
42
43 char *src, *dst;
44 char n;
45
46 if (str == NULL || *str == '\0') {
47 return nogrouping;
48 }
49
50 for (src = (char*)str, dst = (char*)str; *src != '\0'; src++) {
51
52 /* input string examples: "3;3", "3;2;-1" */
53 if (*src == ';')
54 continue;
55
56 if (*src == '-' && *(src+1) == '1') {
57 *dst++ = CHAR_MAX;
58 src++;
59 continue;
60 }
61
62 if (!isdigit((unsigned char)*src)) {
63 /* broken grouping string */
64 return nogrouping;
65 }
66
67 /* assume all numbers <= 99 */
68 n = *src - '0';
69 if (isdigit((unsigned char)*(src+1))) {
70 src++;
71 n *= 10;
72 n += *src - '0';
73 }
74
75 *dst = n;
76 /* NOTE: assume all input started with "0" as 'no grouping' */
77 if (*dst == '\0')
78 return (dst == (char*)str) ? nogrouping : str;
79 dst++;
80 }
81 *dst = '\0';
82 return str;
83}